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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Technical Memorandums
 Collection: National Advisory Committee for Aeronautics Collection
Diesel-engine investigations : ignition-chamber engines

Diesel-engine investigations : ignition-chamber engines

Date: October 1, 1930
Creator: Neumann, Kurt
Description: This report presents a thorough investigation of the functioning process and injection and combustion characteristics of ignition-chamber engines.
Contributing Partner: UNT Libraries Government Documents Department
Downwash measurements behind wings with detached float

Downwash measurements behind wings with detached float

Date: August 1, 1931
Creator: Petersohn, E
Description: This investigation, which was made in the small wind tunnel having a diameter of 1.2 m (3.94 feet), embraced three wing models, behind which, at various angles of attack between 0 and 60 degrees, the static pressure and the total pressure along vertical lines (perpendicular to the direction of the undisturbed wind and to the wing span) were measured. The location of these vertical lines are indicated in Figure 1. Moreover, the wing polars were determined by the customary three-component measurements. For testing the pressure field, a Pitot tube and a static probe, both of 2 mm (0.08 in.) in diameter, were mounted 40 mm (1.57 in.) apart on the end of a shaft 1 m (39.37 in.) long.
Contributing Partner: UNT Libraries Government Documents Department
Fire prevention on airplanes. Part I

Fire prevention on airplanes. Part I

Date: October 1, 1929
Creator: Sabatier, J
Description: Various methods for preventing fires in airplanes are presented with most efforts centering around prevention of backfires, new engine and carburetor designs, as well as investigations on different types of fuels.
Contributing Partner: UNT Libraries Government Documents Department
Aeronautical education and research at the Swiss Institute of Technology in Zurich

Aeronautical education and research at the Swiss Institute of Technology in Zurich

Date: April 1, 1931
Creator: Karner, L & Ackeret, J
Description: Progress in the scientific and practical fields of aviation has caused the Swiss Institute of Technology to organize lectures and practical training courses in all three branches of aeronautics and to found centers of scientific research, laboratories, etc., in order to supply the government and industries with scientifically and technically trained engineers.
Contributing Partner: UNT Libraries Government Documents Department
Remarks on building of low-powered airplanes

Remarks on building of low-powered airplanes

Date: January 1, 1924
Creator: Langsdorff, Werner V
Description: If the low-powered airplane is to be used advantageously by private individuals, the most important consideration is a smaller fuel consumption and, hence, a lower engine power. From experiments with gliders, it appears entirely possible, by utilizing ascending winds (on the weather side of mountains and those generated by the heat of the sun) and by employing engine flight intermittently, as required to fly long distances over land.
Contributing Partner: UNT Libraries Government Documents Department
Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part II

Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part II

Date: May 1, 1926
Creator: Heinlein, Fritz
Description: This report is an evaluation of the experiments on the use of heavy oils in explosion engines. A method for determining the heat of vaporization of these heavy oils is presented.
Contributing Partner: UNT Libraries Government Documents Department
Resistance of plates and pipes at high Reynolds numbers

Resistance of plates and pipes at high Reynolds numbers

Date: January 1, 1931
Creator: Schiller, L & Hermann, R
Description: It was learned that the law of resistance for high R values does not follow the simple powers, and that the powers, which can be obtained approximately for the velocity distribution, gradually change. Since, moreover, very important investigations have recently been made on the resistance of plates at very high R values, it seemed of interest to apply the above line of reasoning to the new general law of resistance. For this purpose, the resistance and velocity distribution along the plate must always be equal to the values of the pipe flow at the corresponding Reynolds number. We made two kinds of calculations, of which the one given here is the simpler and more practical and also agrees better with the experimental results.
Contributing Partner: UNT Libraries Government Documents Department
Development of tailless and all-wing gliders and airplanes

Development of tailless and all-wing gliders and airplanes

Date: April 1, 1932
Creator: Lademann, Robert W E
Description: Tailless airplanes are characterized by having all their control surfaces, especially the elevator, incorporated in the wings. This paper provides a discussion of the history of their development and current state of development.
Contributing Partner: UNT Libraries Government Documents Department
Unsymmetrical forces in an airplane cell

Unsymmetrical forces in an airplane cell

Date: November 1, 1929
Creator: Vogt, R
Description: This paper calls attention to the desirability of expanding airplane building regulations to include proof of safety for cases of unsymmetrical loading, at least in the structural members which are thereby specially stressed.
Contributing Partner: UNT Libraries Government Documents Department
The vector ruling protractor

The vector ruling protractor

Date: March 1, 1924
Creator: Zahm, A F
Description: The theory, structure and working of a vector slide rule is presented in this report. This instrument is used for determining a vector in magnitude and position when given its components and its moment about a point in their plane.
Contributing Partner: UNT Libraries Government Documents Department